[linux-lvm] Opps while attempting snapshot

[Greg Freemyer]

I just got the below oops while working with a newly upgraded SUSE 10.1 install.

It uses a 2.6.16.13-4 Suse kernel and lvm2-2.02.02-9 userland.

I was attempting to work with a LVM snapshot at the time.

I have not yet attempted replicate this with a 2.6.17 kernel.

I assume the below is related to LVM snapshots?

thanks,
Greg
====
Jul  7 16:18:56 Forensic1000 udevd-event[32296]: run_program:
'/sbin/dmsetup' abnormal exit
Jul  7 16:18:56 Forensic1000 kernel: Unable to handle kernel NULL
pointer dereference at virtual address 00000024
Jul  7 16:18:56 Forensic1000 kernel:  printing eip:
Jul  7 16:18:56 Forensic1000 kernel: c0290ca0
Jul  7 16:18:56 Forensic1000 kernel: *pde = 00000000
Jul  7 16:18:56 Forensic1000 kernel: Oops: 0002 [#1]
Jul  7 16:18:56 Forensic1000 kernel: SMP
Jul  7 16:18:56 Forensic1000 kernel: last sysfs file: /block/sda/size
Jul  7 16:18:56 Forensic1000 kernel: Modules linked in: nls_utf8 udf
joydev st ide_cd sr_mod cdrom usb_storage iptable_filter ip_tables
x_tables dm_snapshot ipv6 button battery ac xfs_quota xfs exportfs
loop dm_mod hw_random intel_agp agpgart shpchp pci_hotplug uhci_hcd
ehci_hcd i8xx_tco usbcore i2c_i801 i2c_core e100 mii parport_pc lp
parport ext3 jbd piix fan thermal processor sg 3w_xxxx sd_mod scsi_mod
ide_disk ide_core
Jul  7 16:18:56 Forensic1000 kernel: CPU:    0
Jul  7 16:18:56 Forensic1000 kernel: EIP:    0060:[<c0290ca0>]    Not
tainted VLI
Jul  7 16:18:56 Forensic1000 kernel: EFLAGS: 00210246   (2.6.16.13-4-smp #1)
Jul  7 16:18:56 Forensic1000 kernel: EIP is at _read_lock+0x0/0xc
Jul  7 16:18:56 Forensic1000 kernel: eax: 00000024   ebx: 00000000
ecx: 00000000   edx: 00000000
Jul  7 16:18:56 Forensic1000 kernel: esi: 00000000   edi: fffffffa
ebp: 00000000   esp: e4be5dcc
Jul  7 16:18:56 Forensic1000 kernel: ds: 007b   es: 007b   ss: 0068
Jul  7 16:18:56 Forensic1000 kernel: Process dmsetup (pid: 32298,
threadinfo=e4be4000 task=dfc900b0)
Jul  7 16:18:56 Forensic1000 kernel: Stack: <0>f98317bf 00000000
f991d000 f98317e1 00000000 f991d000 fffffffa 00000000
Jul  7 16:18:56 Forensic1000 kernel:        f9831909 f991d000 f9833f6a
00000163 00000004 f991d000 f991d000 fffffffa
Jul  7 16:18:56 Forensic1000 kernel:        e4be4000 f98341d6 f991d000
fffffff4 00000007 f9834e79 f98341c7 00000004
Jul  7 16:18:56 Forensic1000 kernel: Call Trace:
Jul  7 16:18:56 Forensic1000 kernel:  [<f98317bf>]
dm_get_table+0xc/0x23 [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<f98317e1>] dm_put+0xb/0x11b [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<f9831909>]
dm_get_mdptr+0x18/0x1c [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<f9833f6a>]
find_device+0x34/0xa4 [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<f98341d6>] dev_status+0xf/0x2b [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<f9834e79>]
ctl_ioctl+0x1ee/0x232 [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<f98341c7>] dev_status+0x0/0x2b [dm_mod]
Jul  7 16:18:57 Forensic1000 kernel:  [<c016ae00>] do_ioctl+0x48/0x5e
Jul  7 16:18:57 Forensic1000 kernel:  [<c016b062>] vfs_ioctl+0x24c/0x25e
Jul  7 16:18:57 Forensic1000 kernel:  [<c016b0bc>] sys_ioctl+0x48/0x60
Jul  7 16:18:57 Forensic1000 kernel:  [<c0103c89>] syscall_call+0x7/0xb
Jul  7 16:18:57 Forensic1000 kernel: Code: 31 c0 84 d2 0f 9f c0 c3 b2
01 86 10 c3 b1 01 86 08 52 9d c3 b2 01 86 10 fb c3 f0 83 28 01 79 05
e8 4e e1 ff ff b8 01 00 00 00 c3 <f0> 83 28 01 79 05 e8 3d e1 ff ff c3
9c 5a fa f0 83 28 01 79 05


-- 
Greg Freemyer
The Norcross Group
Forensics for the 21st Century